????????
      ----------
URQYF ) QTXYMRQR
       -URQYF
        =====
        UFYGGR
       -UFMMPT
        ======
          WTQWQ
         -QMFRX
          =====
           YFFUR
          -PYFWG
           =====
           ?????

base: 12
symbols: FGMNPQRTUWXY
difficulty: medium
missing: N